96 XP enigne problem

[babyjoker494]

I had a new cylinder put in last fall and today was the first day i used the ski in the water since. I ran it slwo for the first few mins and then used it like i normally do. It ran fine for about 30 mins and then started to feel like a car does when its running out of gas, then it slowed considedrably at full throttle. When i would let it idle it would shut down, but it always starts right back up. A loud "pinging/knocking noise" comes from the engine every couple seconds...what did I do?!

 

[popasodatastie]

well you could always take it apart and see if somthing wanst tighened down did you do any of the new engine break in items you might have already durned out the piston or rings i would check it before you do more damage. a little check can save a motor. Also what kinda of gas do you use?